Iterative receiver for single carrier cyclic prefix assisted block transmission systems

An iterative receiver algorithm is derived for single carrier cyclic prefix (CP) assisted block transmission systems. The proposed algorithm is based on iterative frequency domain detection and decoding. At each iteration, soft inter-symbol interference cancellation (ISIC) and minimum mean-square-error (MMSE) equalization both in the frequency domain are used symbol by symbol to minimize the performance degradation caused by frequency-selective channels. We also consider an approximate implementation of the proposed algorithm suffering from little performance loss in exchange for complexity reduction. The bit-error rate (BER) as a function of the signal-to-noise ratio (SNR) is used as a performance measure. In addition, the convergence characteristic of the iterative loop is studied with the extrinsic information transfer (EXIT) chart.